1 /*
2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "c1/c1_Defs.hpp"
27 #include "c1/c1_MacroAssembler.hpp"
28 #include "c1/c1_Runtime1.hpp"
29 #include "interpreter/interpreter.hpp"
30 #include "nativeInst_sparc.hpp"
31 #include "oops/compiledICHolder.hpp"
32 #include "oops/oop.inline.hpp"
33 #include "prims/jvmtiExport.hpp"
34 #include "register_sparc.hpp"
35 #include "runtime/sharedRuntime.hpp"
36 #include "runtime/signature.hpp"
37 #include "runtime/vframeArray.hpp"
38 #include "utilities/macros.hpp"
39 #include "vmreg_sparc.inline.hpp"
40 #if INCLUDE_ALL_GCS
41 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
42 #endif
43
44 // Implementation of StubAssembler
45
46 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry_point, int number_of_arguments) {
47 // for sparc changing the number of arguments doesn't change
48 // anything about the frame size so we'll always lie and claim that
49 // we are only passing 1 argument.
50 set_num_rt_args(1);
51
52 assert_not_delayed();
53 // bang stack before going to runtime
54 set(-os::vm_page_size() + STACK_BIAS, G3_scratch);
55 st(G0, SP, G3_scratch);
56
57 // debugging support
58 assert(number_of_arguments >= 0 , "cannot have negative number of arguments");
59
60 set_last_Java_frame(SP, noreg);
61 if (VerifyThread) mov(G2_thread, O0); // about to be smashed; pass early
62 save_thread(L7_thread_cache);
63 // do the call
64 call(entry_point, relocInfo::runtime_call_type);
65 if (!VerifyThread) {
66 delayed()->mov(G2_thread, O0); // pass thread as first argument
67 } else {
68 delayed()->nop(); // (thread already passed)
69 }
70 int call_offset = offset(); // offset of return address
71 restore_thread(L7_thread_cache);
72 reset_last_Java_frame();
73
74 // check for pending exceptions
75 { Label L;
76 Address exception_addr(G2_thread, Thread::pending_exception_offset());
77 ld_ptr(exception_addr, Gtemp);
78 br_null_short(Gtemp, pt, L);
79 Address vm_result_addr(G2_thread, JavaThread::vm_result_offset());
80 st_ptr(G0, vm_result_addr);
81 Address vm_result_addr_2(G2_thread, JavaThread::vm_result_2_offset());
82 st_ptr(G0, vm_result_addr_2);
83
84 if (frame_size() == no_frame_size) {
85 // we use O7 linkage so that forward_exception_entry has the issuing PC
86 call(StubRoutines::forward_exception_entry(), relocInfo::runtime_call_type);
87 delayed()->restore();
88 } else if (_stub_id == Runtime1::forward_exception_id) {
89 should_not_reach_here();
90 } else {
91 AddressLiteral exc(Runtime1::entry_for(Runtime1::forward_exception_id));
92 jump_to(exc, G4);
93 delayed()->nop();
94 }
95 bind(L);
96 }
97
98 // get oop result if there is one and reset the value in the thread
99 if (oop_result1->is_valid()) { // get oop result if there is one and reset it in the thread
100 get_vm_result (oop_result1);
101 } else {
102 // be a little paranoid and clear the result
103 Address vm_result_addr(G2_thread, JavaThread::vm_result_offset());
104 st_ptr(G0, vm_result_addr);
105 }
106
107 // get second result if there is one and reset the value in the thread
108 if (metadata_result->is_valid()) {
109 get_vm_result_2 (metadata_result);
110 } else {
111 // be a little paranoid and clear the result
112 Address vm_result_addr_2(G2_thread, JavaThread::vm_result_2_offset());
113 st_ptr(G0, vm_result_addr_2);
114 }
115
116 return call_offset;
117 }
118
119
120 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
121 // O0 is reserved for the thread
122 mov(arg1, O1);
123 return call_RT(oop_result1, metadata_result, entry, 1);
124 }
125
126
127 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) {
128 // O0 is reserved for the thread
129 mov(arg1, O1);
130 mov(arg2, O2); assert(arg2 != O1, "smashed argument");
131 return call_RT(oop_result1, metadata_result, entry, 2);
132 }
133
134
135 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
136 // O0 is reserved for the thread
137 mov(arg1, O1);
138 mov(arg2, O2); assert(arg2 != O1, "smashed argument");
139 mov(arg3, O3); assert(arg3 != O1 && arg3 != O2, "smashed argument");
140 return call_RT(oop_result1, metadata_result, entry, 3);
141 }
142
143
144 // Implementation of Runtime1
145
146 #define __ sasm->
147
148 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs];
149 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs];
150 static int reg_save_size_in_words;
151 static int frame_size_in_bytes = -1;
152
153 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) {
154 assert(frame_size_in_bytes == __ total_frame_size_in_bytes(reg_save_size_in_words),
155 "mismatch in calculation");
156 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
157 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
158 OopMap* oop_map = new OopMap(frame_size_in_slots, 0);
159
160 int i;
161 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
162 Register r = as_Register(i);
163 if (r == G1 || r == G3 || r == G4 || r == G5) {
164 int sp_offset = cpu_reg_save_offsets[i];
165 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
166 r->as_VMReg());
167 }
168 }
169
170 if (save_fpu_registers) {
171 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
172 FloatRegister r = as_FloatRegister(i);
173 int sp_offset = fpu_reg_save_offsets[i];
174 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
175 r->as_VMReg());
176 }
177 }
178 return oop_map;
179 }
180
181 static OopMap* save_live_registers(StubAssembler* sasm, bool save_fpu_registers = true) {
182 assert(frame_size_in_bytes == __ total_frame_size_in_bytes(reg_save_size_in_words),
183 "mismatch in calculation");
184 __ save_frame_c1(frame_size_in_bytes);
185
186 // Record volatile registers as callee-save values in an OopMap so their save locations will be
187 // propagated to the caller frame's RegisterMap during StackFrameStream construction (needed for
188 // deoptimization; see compiledVFrame::create_stack_value). The caller's I, L and O registers
189 // are saved in register windows - I's and L's in the caller's frame and O's in the stub frame
190 // (as the stub's I's) when the runtime routine called by the stub creates its frame.
191 // OopMap frame sizes are in c2 stack slot sizes (sizeof(jint))
192
193 int i;
194 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
195 Register r = as_Register(i);
196 if (r == G1 || r == G3 || r == G4 || r == G5) {
197 int sp_offset = cpu_reg_save_offsets[i];
198 __ st_ptr(r, SP, (sp_offset * BytesPerWord) + STACK_BIAS);
199 }
200 }
201
202 if (save_fpu_registers) {
203 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
204 FloatRegister r = as_FloatRegister(i);
205 int sp_offset = fpu_reg_save_offsets[i];
206 __ stf(FloatRegisterImpl::S, r, SP, (sp_offset * BytesPerWord) + STACK_BIAS);
207 }
208 }
209
210 return generate_oop_map(sasm, save_fpu_registers);
211 }
212
213 static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) {
214 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) {
215 Register r = as_Register(i);
216 if (r == G1 || r == G3 || r == G4 || r == G5) {
217 __ ld_ptr(SP, (cpu_reg_save_offsets[i] * BytesPerWord) + STACK_BIAS, r);
218 }
219 }
220
221 if (restore_fpu_registers) {
222 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) {
223 FloatRegister r = as_FloatRegister(i);
224 __ ldf(FloatRegisterImpl::S, SP, (fpu_reg_save_offsets[i] * BytesPerWord) + STACK_BIAS, r);
225 }
226 }
227 }
228
229
230 void Runtime1::initialize_pd() {
231 // compute word offsets from SP at which live (non-windowed) registers are captured by stub routines
232 //
233 // A stub routine will have a frame that is at least large enough to hold
234 // a register window save area (obviously) and the volatile g registers
235 // and floating registers. A user of save_live_registers can have a frame
236 // that has more scratch area in it (although typically they will use L-regs).
237 // in that case the frame will look like this (stack growing down)
238 //
239 // FP -> | |
240 // | scratch mem |
241 // | " " |
242 // --------------
243 // | float regs |
244 // | " " |
245 // ---------------
246 // | G regs |
247 // | " " |
248 // ---------------
249 // | abi reg. |
250 // | window save |
251 // | area |
252 // SP -> ---------------
253 //
254 int i;
255 int sp_offset = round_to(frame::register_save_words, 2); // start doubleword aligned
256
257 // only G int registers are saved explicitly; others are found in register windows
258 for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
259 Register r = as_Register(i);
260 if (r == G1 || r == G3 || r == G4 || r == G5) {
261 cpu_reg_save_offsets[i] = sp_offset;
262 sp_offset++;
263 }
264 }
265
266 // all float registers are saved explicitly
267 assert(FrameMap::nof_fpu_regs == 32, "double registers not handled here");
268 for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
269 fpu_reg_save_offsets[i] = sp_offset;
270 sp_offset++;
271 }
272 reg_save_size_in_words = sp_offset - frame::memory_parameter_word_sp_offset;
273 // this should match assembler::total_frame_size_in_bytes, which
274 // isn't callable from this context. It's checked by an assert when
275 // it's used though.
276 frame_size_in_bytes = align_size_up(sp_offset * wordSize, 8);
277 }
278
279
280 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
281 // make a frame and preserve the caller's caller-save registers
282 OopMap* oop_map = save_live_registers(sasm);
283 int call_offset;
284 if (!has_argument) {
285 call_offset = __ call_RT(noreg, noreg, target);
286 } else {
287 call_offset = __ call_RT(noreg, noreg, target, G4);
288 }
289 OopMapSet* oop_maps = new OopMapSet();
290 oop_maps->add_gc_map(call_offset, oop_map);
291
292 __ should_not_reach_here();
293 return oop_maps;
294 }
295
296
297 OopMapSet* Runtime1::generate_stub_call(StubAssembler* sasm, Register result, address target,
298 Register arg1, Register arg2, Register arg3) {
299 // make a frame and preserve the caller's caller-save registers
300 OopMap* oop_map = save_live_registers(sasm);
301
302 int call_offset;
303 if (arg1 == noreg) {
304 call_offset = __ call_RT(result, noreg, target);
305 } else if (arg2 == noreg) {
306 call_offset = __ call_RT(result, noreg, target, arg1);
307 } else if (arg3 == noreg) {
308 call_offset = __ call_RT(result, noreg, target, arg1, arg2);
309 } else {
310 call_offset = __ call_RT(result, noreg, target, arg1, arg2, arg3);
311 }
312 OopMapSet* oop_maps = NULL;
313
314 oop_maps = new OopMapSet();
315 oop_maps->add_gc_map(call_offset, oop_map);
316 restore_live_registers(sasm);
317
318 __ ret();
319 __ delayed()->restore();
320
321 return oop_maps;
322 }
323
324
325 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
326 // make a frame and preserve the caller's caller-save registers
327 OopMap* oop_map = save_live_registers(sasm);
328
329 // call the runtime patching routine, returns non-zero if nmethod got deopted.
330 int call_offset = __ call_RT(noreg, noreg, target);
331 OopMapSet* oop_maps = new OopMapSet();
332 oop_maps->add_gc_map(call_offset, oop_map);
333
334 // re-execute the patched instruction or, if the nmethod was deoptmized, return to the
335 // deoptimization handler entry that will cause re-execution of the current bytecode
336 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
337 assert(deopt_blob != NULL, "deoptimization blob must have been created");
338
339 Label no_deopt;
340 __ br_null_short(O0, Assembler::pt, no_deopt);
341
342 // return to the deoptimization handler entry for unpacking and rexecute
343 // if we simply returned the we'd deopt as if any call we patched had just
344 // returned.
345
346 restore_live_registers(sasm);
347
348 AddressLiteral dest(deopt_blob->unpack_with_reexecution());
349 __ jump_to(dest, O0);
350 __ delayed()->restore();
351
352 __ bind(no_deopt);
353 restore_live_registers(sasm);
354 __ ret();
355 __ delayed()->restore();
356
357 return oop_maps;
358 }
359
360 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
361
362 OopMapSet* oop_maps = NULL;
363 // for better readability
364 const bool must_gc_arguments = true;
365 const bool dont_gc_arguments = false;
366
367 // stub code & info for the different stubs
368 switch (id) {
369 case forward_exception_id:
370 {
371 oop_maps = generate_handle_exception(id, sasm);
372 }
373 break;
374
375 case new_instance_id:
376 case fast_new_instance_id:
377 case fast_new_instance_init_check_id:
378 {
379 Register G5_klass = G5; // Incoming
380 Register O0_obj = O0; // Outgoing
381
382 if (id == new_instance_id) {
383 __ set_info("new_instance", dont_gc_arguments);
384 } else if (id == fast_new_instance_id) {
385 __ set_info("fast new_instance", dont_gc_arguments);
386 } else {
387 assert(id == fast_new_instance_init_check_id, "bad StubID");
388 __ set_info("fast new_instance init check", dont_gc_arguments);
389 }
390
391 if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) &&
392 UseTLAB && FastTLABRefill) {
393 Label slow_path;
394 Register G1_obj_size = G1;
395 Register G3_t1 = G3;
396 Register G4_t2 = G4;
397 assert_different_registers(G5_klass, G1_obj_size, G3_t1, G4_t2);
398
399 // Push a frame since we may do dtrace notification for the
400 // allocation which requires calling out and we don't want
401 // to stomp the real return address.
402 __ save_frame(0);
403
404 if (id == fast_new_instance_init_check_id) {
405 // make sure the klass is initialized
406 __ ldub(G5_klass, in_bytes(InstanceKlass::init_state_offset()), G3_t1);
407 __ cmp_and_br_short(G3_t1, InstanceKlass::fully_initialized, Assembler::notEqual, Assembler::pn, slow_path);
408 }
409 #ifdef ASSERT
410 // assert object can be fast path allocated
411 {
412 Label ok, not_ok;
413 __ ld(G5_klass, in_bytes(Klass::layout_helper_offset()), G1_obj_size);
414 // make sure it's an instance (LH > 0)
415 __ cmp_and_br_short(G1_obj_size, 0, Assembler::lessEqual, Assembler::pn, not_ok);
416 __ btst(Klass::_lh_instance_slow_path_bit, G1_obj_size);
417 __ br(Assembler::zero, false, Assembler::pn, ok);
418 __ delayed()->nop();
419 __ bind(not_ok);
420 __ stop("assert(can be fast path allocated)");
421 __ should_not_reach_here();
422 __ bind(ok);
423 }
424 #endif // ASSERT
425 // if we got here then the TLAB allocation failed, so try
426 // refilling the TLAB or allocating directly from eden.
427 Label retry_tlab, try_eden;
428 __ tlab_refill(retry_tlab, try_eden, slow_path); // preserves G5_klass
429
430 __ bind(retry_tlab);
431
432 // get the instance size
433 __ ld(G5_klass, in_bytes(Klass::layout_helper_offset()), G1_obj_size);
434
435 __ tlab_allocate(O0_obj, G1_obj_size, 0, G3_t1, slow_path);
436
437 __ initialize_object(O0_obj, G5_klass, G1_obj_size, 0, G3_t1, G4_t2);
438 __ verify_oop(O0_obj);
439 __ mov(O0, I0);
440 __ ret();
441 __ delayed()->restore();
442
443 __ bind(try_eden);
444 // get the instance size
445 __ ld(G5_klass, in_bytes(Klass::layout_helper_offset()), G1_obj_size);
446 __ eden_allocate(O0_obj, G1_obj_size, 0, G3_t1, G4_t2, slow_path);
447 __ incr_allocated_bytes(G1_obj_size, G3_t1, G4_t2);
448
449 __ initialize_object(O0_obj, G5_klass, G1_obj_size, 0, G3_t1, G4_t2);
450 __ verify_oop(O0_obj);
451 __ mov(O0, I0);
452 __ ret();
453 __ delayed()->restore();
454
455 __ bind(slow_path);
456
457 // pop this frame so generate_stub_call can push it's own
458 __ restore();
459 }
460
461 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_instance), G5_klass);
462 // I0->O0: new instance
463 }
464
465 break;
466
467 case counter_overflow_id:
468 // G4 contains bci, G5 contains method
469 oop_maps = generate_stub_call(sasm, noreg, CAST_FROM_FN_PTR(address, counter_overflow), G4, G5);
470 break;
471
472 case new_type_array_id:
473 case new_object_array_id:
474 {
475 Register G5_klass = G5; // Incoming
476 Register G4_length = G4; // Incoming
477 Register O0_obj = O0; // Outgoing
478
479 Address klass_lh(G5_klass, Klass::layout_helper_offset());
480 assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise");
481 assert(Klass::_lh_header_size_mask == 0xFF, "bytewise");
482 // Use this offset to pick out an individual byte of the layout_helper:
483 const int klass_lh_header_size_offset = ((BytesPerInt - 1) // 3 - 2 selects byte {0,1,0,0}
484 - Klass::_lh_header_size_shift / BitsPerByte);
485
486 if (id == new_type_array_id) {
487 __ set_info("new_type_array", dont_gc_arguments);
488 } else {
489 __ set_info("new_object_array", dont_gc_arguments);
490 }
491
492 #ifdef ASSERT
493 // assert object type is really an array of the proper kind
494 {
495 Label ok;
496 Register G3_t1 = G3;
497 __ ld(klass_lh, G3_t1);
498 __ sra(G3_t1, Klass::_lh_array_tag_shift, G3_t1);
499 int tag = ((id == new_type_array_id)
500 ? Klass::_lh_array_tag_type_value
501 : Klass::_lh_array_tag_obj_value);
502 __ cmp_and_brx_short(G3_t1, tag, Assembler::equal, Assembler::pt, ok);
503 __ stop("assert(is an array klass)");
504 __ should_not_reach_here();
505 __ bind(ok);
506 }
507 #endif // ASSERT
508
509 if (UseTLAB && FastTLABRefill) {
510 Label slow_path;
511 Register G1_arr_size = G1;
512 Register G3_t1 = G3;
513 Register O1_t2 = O1;
514 assert_different_registers(G5_klass, G4_length, G1_arr_size, G3_t1, O1_t2);
515
516 // check that array length is small enough for fast path
517 __ set(C1_MacroAssembler::max_array_allocation_length, G3_t1);
518 __ cmp_and_br_short(G4_length, G3_t1, Assembler::greaterUnsigned, Assembler::pn, slow_path);
519
520 // if we got here then the TLAB allocation failed, so try
521 // refilling the TLAB or allocating directly from eden.
522 Label retry_tlab, try_eden;
523 __ tlab_refill(retry_tlab, try_eden, slow_path); // preserves G4_length and G5_klass
524
525 __ bind(retry_tlab);
526
527 // get the allocation size: (length << (layout_helper & 0x1F)) + header_size
528 __ ld(klass_lh, G3_t1);
529 __ sll(G4_length, G3_t1, G1_arr_size);
530 __ srl(G3_t1, Klass::_lh_header_size_shift, G3_t1);
531 __ and3(G3_t1, Klass::_lh_header_size_mask, G3_t1);
532 __ add(G1_arr_size, G3_t1, G1_arr_size);
533 __ add(G1_arr_size, MinObjAlignmentInBytesMask, G1_arr_size); // align up
534 __ and3(G1_arr_size, ~MinObjAlignmentInBytesMask, G1_arr_size);
535
536 __ tlab_allocate(O0_obj, G1_arr_size, 0, G3_t1, slow_path); // preserves G1_arr_size
537
538 __ initialize_header(O0_obj, G5_klass, G4_length, G3_t1, O1_t2);
539 __ ldub(klass_lh, G3_t1, klass_lh_header_size_offset);
540 __ sub(G1_arr_size, G3_t1, O1_t2); // body length
541 __ add(O0_obj, G3_t1, G3_t1); // body start
542 __ initialize_body(G3_t1, O1_t2);
543 __ verify_oop(O0_obj);
544 __ retl();
545 __ delayed()->nop();
546
547 __ bind(try_eden);
548 // get the allocation size: (length << (layout_helper & 0x1F)) + header_size
549 __ ld(klass_lh, G3_t1);
550 __ sll(G4_length, G3_t1, G1_arr_size);
551 __ srl(G3_t1, Klass::_lh_header_size_shift, G3_t1);
552 __ and3(G3_t1, Klass::_lh_header_size_mask, G3_t1);
553 __ add(G1_arr_size, G3_t1, G1_arr_size);
554 __ add(G1_arr_size, MinObjAlignmentInBytesMask, G1_arr_size);
555 __ and3(G1_arr_size, ~MinObjAlignmentInBytesMask, G1_arr_size);
556
557 __ eden_allocate(O0_obj, G1_arr_size, 0, G3_t1, O1_t2, slow_path); // preserves G1_arr_size
558 __ incr_allocated_bytes(G1_arr_size, G3_t1, O1_t2);
559
560 __ initialize_header(O0_obj, G5_klass, G4_length, G3_t1, O1_t2);
561 __ ldub(klass_lh, G3_t1, klass_lh_header_size_offset);
562 __ sub(G1_arr_size, G3_t1, O1_t2); // body length
563 __ add(O0_obj, G3_t1, G3_t1); // body start
564 __ initialize_body(G3_t1, O1_t2);
565 __ verify_oop(O0_obj);
566 __ retl();
567 __ delayed()->nop();
568
569 __ bind(slow_path);
570 }
571
572 if (id == new_type_array_id) {
573 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_type_array), G5_klass, G4_length);
574 } else {
575 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_object_array), G5_klass, G4_length);
576 }
577 // I0 -> O0: new array
578 }
579 break;
580
581 case new_multi_array_id:
582 { // O0: klass
583 // O1: rank
584 // O2: address of 1st dimension
585 __ set_info("new_multi_array", dont_gc_arguments);
586 oop_maps = generate_stub_call(sasm, I0, CAST_FROM_FN_PTR(address, new_multi_array), I0, I1, I2);
587 // I0 -> O0: new multi array
588 }
589 break;
590
591 case register_finalizer_id:
592 {
593 __ set_info("register_finalizer", dont_gc_arguments);
594
595 // load the klass and check the has finalizer flag
596 Label register_finalizer;
597 Register t = O1;
598 __ load_klass(O0, t);
599 __ ld(t, in_bytes(Klass::access_flags_offset()), t);
600 __ set(JVM_ACC_HAS_FINALIZER, G3);
601 __ andcc(G3, t, G0);
602 __ br(Assembler::notZero, false, Assembler::pt, register_finalizer);
603 __ delayed()->nop();
604
605 // do a leaf return
606 __ retl();
607 __ delayed()->nop();
608
609 __ bind(register_finalizer);
610 OopMap* oop_map = save_live_registers(sasm);
611 int call_offset = __ call_RT(noreg, noreg,
612 CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), I0);
613 oop_maps = new OopMapSet();
614 oop_maps->add_gc_map(call_offset, oop_map);
615
616 // Now restore all the live registers
617 restore_live_registers(sasm);
618
619 __ ret();
620 __ delayed()->restore();
621 }
622 break;
623
624 case throw_range_check_failed_id:
625 { __ set_info("range_check_failed", dont_gc_arguments); // arguments will be discarded
626 // G4: index
627 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true);
628 }
629 break;
630
631 case throw_index_exception_id:
632 { __ set_info("index_range_check_failed", dont_gc_arguments); // arguments will be discarded
633 // G4: index
634 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
635 }
636 break;
637
638 case throw_div0_exception_id:
639 { __ set_info("throw_div0_exception", dont_gc_arguments);
640 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
641 }
642 break;
643
644 case throw_null_pointer_exception_id:
645 { __ set_info("throw_null_pointer_exception", dont_gc_arguments);
646 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
647 }
648 break;
649
650 case handle_exception_id:
651 { __ set_info("handle_exception", dont_gc_arguments);
652 oop_maps = generate_handle_exception(id, sasm);
653 }
654 break;
655
656 case handle_exception_from_callee_id:
657 { __ set_info("handle_exception_from_callee", dont_gc_arguments);
658 oop_maps = generate_handle_exception(id, sasm);
659 }
660 break;
661
662 case unwind_exception_id:
663 {
664 // O0: exception
665 // I7: address of call to this method
666
667 __ set_info("unwind_exception", dont_gc_arguments);
668 __ mov(Oexception, Oexception->after_save());
669 __ add(I7, frame::pc_return_offset, Oissuing_pc->after_save());
670
671 __ call_VM_leaf(L7_thread_cache, CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address),
672 G2_thread, Oissuing_pc->after_save());
673 __ verify_not_null_oop(Oexception->after_save());
674
675 // Restore SP from L7 if the exception PC is a method handle call site.
676 __ mov(O0, G5); // Save the target address.
677 __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), L0);
678 __ tst(L0); // Condition codes are preserved over the restore.
679 __ restore();
680
681 __ jmp(G5, 0);
682 __ delayed()->movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP); // Restore SP if required.
683 }
684 break;
685
686 case throw_array_store_exception_id:
687 {
688 __ set_info("throw_array_store_exception", dont_gc_arguments);
689 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
690 }
691 break;
692
693 case throw_class_cast_exception_id:
694 {
695 // G4: object
696 __ set_info("throw_class_cast_exception", dont_gc_arguments);
697 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
698 }
699 break;
700
701 case throw_incompatible_class_change_error_id:
702 {
703 __ set_info("throw_incompatible_class_cast_exception", dont_gc_arguments);
704 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
705 }
706 break;
707
708 case slow_subtype_check_id:
709 { // Support for uint StubRoutine::partial_subtype_check( Klass sub, Klass super );
710 // Arguments :
711 //
712 // ret : G3
713 // sub : G3, argument, destroyed
714 // super: G1, argument, not changed
715 // raddr: O7, blown by call
716 Label miss;
717
718 __ save_frame(0); // Blow no registers!
719
720 __ check_klass_subtype_slow_path(G3, G1, L0, L1, L2, L4, NULL, &miss);
721
722 __ mov(1, G3);
723 __ ret(); // Result in G5 is 'true'
724 __ delayed()->restore(); // free copy or add can go here
725
726 __ bind(miss);
727 __ mov(0, G3);
728 __ ret(); // Result in G5 is 'false'
729 __ delayed()->restore(); // free copy or add can go here
730 }
731
732 case monitorenter_nofpu_id:
733 case monitorenter_id:
734 { // G4: object
735 // G5: lock address
736 __ set_info("monitorenter", dont_gc_arguments);
737
738 int save_fpu_registers = (id == monitorenter_id);
739 // make a frame and preserve the caller's caller-save registers
740 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
741
742 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), G4, G5);
743
744 oop_maps = new OopMapSet();
745 oop_maps->add_gc_map(call_offset, oop_map);
746 restore_live_registers(sasm, save_fpu_registers);
747
748 __ ret();
749 __ delayed()->restore();
750 }
751 break;
752
753 case monitorexit_nofpu_id:
754 case monitorexit_id:
755 { // G4: lock address
756 // note: really a leaf routine but must setup last java sp
757 // => use call_RT for now (speed can be improved by
758 // doing last java sp setup manually)
759 __ set_info("monitorexit", dont_gc_arguments);
760
761 int save_fpu_registers = (id == monitorexit_id);
762 // make a frame and preserve the caller's caller-save registers
763 OopMap* oop_map = save_live_registers(sasm, save_fpu_registers);
764
765 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), G4);
766
767 oop_maps = new OopMapSet();
768 oop_maps->add_gc_map(call_offset, oop_map);
769 restore_live_registers(sasm, save_fpu_registers);
770
771 __ ret();
772 __ delayed()->restore();
773 }
774 break;
775
776 case deoptimize_id:
777 {
778 __ set_info("deoptimize", dont_gc_arguments);
779 OopMap* oop_map = save_live_registers(sasm);
780 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize));
781 oop_maps = new OopMapSet();
782 oop_maps->add_gc_map(call_offset, oop_map);
783 restore_live_registers(sasm);
784 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
785 assert(deopt_blob != NULL, "deoptimization blob must have been created");
786 AddressLiteral dest(deopt_blob->unpack_with_reexecution());
787 __ jump_to(dest, O0);
788 __ delayed()->restore();
789 }
790 break;
791
792 case access_field_patching_id:
793 { __ set_info("access_field_patching", dont_gc_arguments);
794 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
795 }
796 break;
797
798 case load_klass_patching_id:
799 { __ set_info("load_klass_patching", dont_gc_arguments);
800 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
801 }
802 break;
803
804 case load_mirror_patching_id:
805 { __ set_info("load_mirror_patching", dont_gc_arguments);
806 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
807 }
808 break;
809
810 case load_appendix_patching_id:
811 { __ set_info("load_appendix_patching", dont_gc_arguments);
812 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
813 }
814 break;
815
816 case dtrace_object_alloc_id:
817 { // O0: object
818 __ set_info("dtrace_object_alloc", dont_gc_arguments);
819 // we can't gc here so skip the oopmap but make sure that all
820 // the live registers get saved.
821 save_live_registers(sasm);
822
823 __ save_thread(L7_thread_cache);
824 __ call(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc),
825 relocInfo::runtime_call_type);
826 __ delayed()->mov(I0, O0);
827 __ restore_thread(L7_thread_cache);
828
829 restore_live_registers(sasm);
830 __ ret();
831 __ delayed()->restore();
832 }
833 break;
834
835 #if INCLUDE_ALL_GCS
836 case g1_pre_barrier_slow_id:
837 { // G4: previous value of memory
838 BarrierSet* bs = Universe::heap()->barrier_set();
839 if (bs->kind() != BarrierSet::G1SATBCTLogging) {
840 __ save_frame(0);
841 __ set((int)id, O1);
842 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), I0);
843 __ should_not_reach_here();
844 break;
845 }
846
847 __ set_info("g1_pre_barrier_slow_id", dont_gc_arguments);
848
849 Register pre_val = G4;
850 Register tmp = G1_scratch;
851 Register tmp2 = G3_scratch;
852
853 Label refill, restart;
854 bool with_frame = false; // I don't know if we can do with-frame.
855 int satb_q_index_byte_offset =
856 in_bytes(JavaThread::satb_mark_queue_offset() +
857 PtrQueue::byte_offset_of_index());
858 int satb_q_buf_byte_offset =
859 in_bytes(JavaThread::satb_mark_queue_offset() +
860 PtrQueue::byte_offset_of_buf());
861
862 __ bind(restart);
863 // Load the index into the SATB buffer. PtrQueue::_index is a
864 // size_t so ld_ptr is appropriate
865 __ ld_ptr(G2_thread, satb_q_index_byte_offset, tmp);
866
867 // index == 0?
868 __ cmp_and_brx_short(tmp, G0, Assembler::equal, Assembler::pn, refill);
869
870 __ ld_ptr(G2_thread, satb_q_buf_byte_offset, tmp2);
871 __ sub(tmp, oopSize, tmp);
872
873 __ st_ptr(pre_val, tmp2, tmp); // [_buf + index] := <address_of_card>
874 // Use return-from-leaf
875 __ retl();
876 __ delayed()->st_ptr(tmp, G2_thread, satb_q_index_byte_offset);
877
878 __ bind(refill);
879 __ save_frame(0);
880
881 __ mov(pre_val, L0);
882 __ mov(tmp, L1);
883 __ mov(tmp2, L2);
884
885 __ call_VM_leaf(L7_thread_cache,
886 CAST_FROM_FN_PTR(address,
887 SATBMarkQueueSet::handle_zero_index_for_thread),
888 G2_thread);
889
890 __ mov(L0, pre_val);
891 __ mov(L1, tmp);
892 __ mov(L2, tmp2);
893
894 __ br(Assembler::always, /*annul*/false, Assembler::pt, restart);
895 __ delayed()->restore();
896 }
897 break;
898
899 case g1_post_barrier_slow_id:
900 {
901 BarrierSet* bs = Universe::heap()->barrier_set();
902 if (bs->kind() != BarrierSet::G1SATBCTLogging) {
903 __ save_frame(0);
904 __ set((int)id, O1);
905 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), I0);
906 __ should_not_reach_here();
907 break;
908 }
909
910 __ set_info("g1_post_barrier_slow_id", dont_gc_arguments);
911
912 Register addr = G4;
913 Register cardtable = G5;
914 Register tmp = G1_scratch;
915 Register tmp2 = G3_scratch;
916 jbyte* byte_map_base = ((CardTableModRefBS*)bs)->byte_map_base;
917
918 Label not_already_dirty, restart, refill, young_card;
919
920 #ifdef _LP64
921 __ srlx(addr, CardTableModRefBS::card_shift, addr);
922 #else
923 __ srl(addr, CardTableModRefBS::card_shift, addr);
924 #endif
925
926 AddressLiteral rs(byte_map_base);
927 __ set(rs, cardtable); // cardtable := <card table base>
928 __ ldub(addr, cardtable, tmp); // tmp := [addr + cardtable]
929
930 __ cmp_and_br_short(tmp, G1SATBCardTableModRefBS::g1_young_card_val(), Assembler::equal, Assembler::pt, young_card);
931
932 __ membar(Assembler::Membar_mask_bits(Assembler::StoreLoad));
933 __ ldub(addr, cardtable, tmp); // tmp := [addr + cardtable]
934
935 assert(CardTableModRefBS::dirty_card_val() == 0, "otherwise check this code");
936 __ cmp_and_br_short(tmp, G0, Assembler::notEqual, Assembler::pt, not_already_dirty);
937
938 __ bind(young_card);
939 // We didn't take the branch, so we're already dirty: return.
940 // Use return-from-leaf
941 __ retl();
942 __ delayed()->nop();
943
944 // Not dirty.
945 __ bind(not_already_dirty);
946
947 // Get cardtable + tmp into a reg by itself
948 __ add(addr, cardtable, tmp2);
949
950 // First, dirty it.
951 __ stb(G0, tmp2, 0); // [cardPtr] := 0 (i.e., dirty).
952
953 Register tmp3 = cardtable;
954 Register tmp4 = tmp;
955
956 // these registers are now dead
957 addr = cardtable = tmp = noreg;
958
959 int dirty_card_q_index_byte_offset =
960 in_bytes(JavaThread::dirty_card_queue_offset() +
961 PtrQueue::byte_offset_of_index());
962 int dirty_card_q_buf_byte_offset =
963 in_bytes(JavaThread::dirty_card_queue_offset() +
964 PtrQueue::byte_offset_of_buf());
965
966 __ bind(restart);
967
968 // Get the index into the update buffer. PtrQueue::_index is
969 // a size_t so ld_ptr is appropriate here.
970 __ ld_ptr(G2_thread, dirty_card_q_index_byte_offset, tmp3);
971
972 // index == 0?
973 __ cmp_and_brx_short(tmp3, G0, Assembler::equal, Assembler::pn, refill);
974
975 __ ld_ptr(G2_thread, dirty_card_q_buf_byte_offset, tmp4);
976 __ sub(tmp3, oopSize, tmp3);
977
978 __ st_ptr(tmp2, tmp4, tmp3); // [_buf + index] := <address_of_card>
979 // Use return-from-leaf
980 __ retl();
981 __ delayed()->st_ptr(tmp3, G2_thread, dirty_card_q_index_byte_offset);
982
983 __ bind(refill);
984 __ save_frame(0);
985
986 __ mov(tmp2, L0);
987 __ mov(tmp3, L1);
988 __ mov(tmp4, L2);
989
990 __ call_VM_leaf(L7_thread_cache,
991 CAST_FROM_FN_PTR(address,
992 DirtyCardQueueSet::handle_zero_index_for_thread),
993 G2_thread);
994
995 __ mov(L0, tmp2);
996 __ mov(L1, tmp3);
997 __ mov(L2, tmp4);
998
999 __ br(Assembler::always, /*annul*/false, Assembler::pt, restart);
1000 __ delayed()->restore();
1001 }
1002 break;
1003 #endif // INCLUDE_ALL_GCS
1004
1005 case predicate_failed_trap_id:
1006 {
1007 __ set_info("predicate_failed_trap", dont_gc_arguments);
1008 OopMap* oop_map = save_live_registers(sasm);
1009
1010 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
1011
1012 oop_maps = new OopMapSet();
1013 oop_maps->add_gc_map(call_offset, oop_map);
1014
1015 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
1016 assert(deopt_blob != NULL, "deoptimization blob must have been created");
1017 restore_live_registers(sasm);
1018
1019 AddressLiteral dest(deopt_blob->unpack_with_reexecution());
1020 __ jump_to(dest, O0);
1021 __ delayed()->restore();
1022 }
1023 break;
1024
1025 default:
1026 { __ set_info("unimplemented entry", dont_gc_arguments);
1027 __ save_frame(0);
1028 __ set((int)id, O1);
1029 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), O1);
1030 __ should_not_reach_here();
1031 }
1032 break;
1033 }
1034 return oop_maps;
1035 }
1036
1037
1038 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler* sasm) {
1039 __ block_comment("generate_handle_exception");
1040
1041 // Save registers, if required.
1042 OopMapSet* oop_maps = new OopMapSet();
1043 OopMap* oop_map = NULL;
1044 switch (id) {
1045 case forward_exception_id:
1046 // We're handling an exception in the context of a compiled frame.
1047 // The registers have been saved in the standard places. Perform
1048 // an exception lookup in the caller and dispatch to the handler
1049 // if found. Otherwise unwind and dispatch to the callers
1050 // exception handler.
1051 oop_map = generate_oop_map(sasm, true);
1052
1053 // transfer the pending exception to the exception_oop
1054 __ ld_ptr(G2_thread, in_bytes(JavaThread::pending_exception_offset()), Oexception);
1055 __ ld_ptr(Oexception, 0, G0);
1056 __ st_ptr(G0, G2_thread, in_bytes(JavaThread::pending_exception_offset()));
1057 __ add(I7, frame::pc_return_offset, Oissuing_pc);
1058 break;
1059 case handle_exception_id:
1060 // At this point all registers MAY be live.
1061 oop_map = save_live_registers(sasm);
1062 __ mov(Oexception->after_save(), Oexception);
1063 __ mov(Oissuing_pc->after_save(), Oissuing_pc);
1064 break;
1065 case handle_exception_from_callee_id:
1066 // At this point all registers except exception oop (Oexception)
1067 // and exception pc (Oissuing_pc) are dead.
1068 oop_map = new OopMap(frame_size_in_bytes / sizeof(jint), 0);
1069 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
1070 __ save_frame_c1(frame_size_in_bytes);
1071 __ mov(Oexception->after_save(), Oexception);
1072 __ mov(Oissuing_pc->after_save(), Oissuing_pc);
1073 break;
1074 default: ShouldNotReachHere();
1075 }
1076
1077 __ verify_not_null_oop(Oexception);
1078
1079 // save the exception and issuing pc in the thread
1080 __ st_ptr(Oexception, G2_thread, in_bytes(JavaThread::exception_oop_offset()));
1081 __ st_ptr(Oissuing_pc, G2_thread, in_bytes(JavaThread::exception_pc_offset()));
1082
1083 // use the throwing pc as the return address to lookup (has bci & oop map)
1084 __ mov(Oissuing_pc, I7);
1085 __ sub(I7, frame::pc_return_offset, I7);
1086 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
1087 oop_maps->add_gc_map(call_offset, oop_map);
1088
1089 // Note: if nmethod has been deoptimized then regardless of
1090 // whether it had a handler or not we will deoptimize
1091 // by entering the deopt blob with a pending exception.
1092
1093 // Restore the registers that were saved at the beginning, remove
1094 // the frame and jump to the exception handler.
1095 switch (id) {
1096 case forward_exception_id:
1097 case handle_exception_id:
1098 restore_live_registers(sasm);
1099 __ jmp(O0, 0);
1100 __ delayed()->restore();
1101 break;
1102 case handle_exception_from_callee_id:
1103 // Restore SP from L7 if the exception PC is a method handle call site.
1104 __ mov(O0, G5); // Save the target address.
1105 __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), L0);
1106 __ tst(L0); // Condition codes are preserved over the restore.
1107 __ restore();
1108
1109 __ jmp(G5, 0); // jump to the exception handler
1110 __ delayed()->movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP); // Restore SP if required.
1111 break;
1112 default: ShouldNotReachHere();
1113 }
1114
1115 return oop_maps;
1116 }
1117
1118
1119 #undef __
1120
1121 const char *Runtime1::pd_name_for_address(address entry) {
1122 return "<unknown function>";
1123 }